Here's one based in Damascus (just south of the HighSchool on 27) I've got one piece (a semi-auto pistol) with him now so I don't yet have the results, but given my conversation with him, the strong recommendation of the folks at the GunShack in Mt. Airy and the condition of his workshop - I'm expecting good things.... (and i thought his price was reasonable as was his target turn around time)

Check out www.saiga-12.com, scroll down left side for Lone Star arms. Check out his website completely including testimonials. He conveted mine to a model call "The Signcutter" It has never had a fail to fire or a fail to eject, even with cheap target loads. You can get the job done cheaper but never better. Good luck with the S-12, you're gonna love it. Start saving money for shot shells.